Stream cipher based on pseudorandom number generation with optical affine transformation

Toru Sasaki, Hiroyuki Togo, Jun Tanida, Yoshiki Ichioka
2000 Applied Optics  
We propose a new, to our knowledge, stream cipher technique for two-dimensional ͑2-D͒ image data that can be implemented by iterative optical transformation. The stream cipher uses a pseudorandom number generator ͑PRNG͒ to generate a pseudorandom bit sequence. The proposed method for the PRNG is composed of the iterative operation of 2-D affine transformation achieved by optical components and by modulo-n addition of the transformed images. We expect efficient execution of the method by optical
more » ... parallel processing. We verify the performance of the proposed method in terms of security strength and clarify problems on optical implementation by the optical fractal synthesizer.
doi:10.1364/ao.39.002340 pmid:18345143 fatcat:rzxbveyp7nct3atv5exqidmtsi